Arctic barrel-bubble vs Polar bear

Retusa obtusa compared with Ursus maritimus

Key Differences

• Arctic barrel-bubble is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Arctic barrel-bubble	Polar bear
Kingdom same	Animalia (hewan)	Animalia (hewan)
Phylum	Mollusca (Moluska)	Chordata (Chordates)
Class	Gastropoda (siput)	Mammalia (mamalia)
Order	Cephalaspidea (Cephalaspidea)	Carnivora (Carnivorans)
Family	Retusidae	Ursidae (Bears)
Genus	Retusa	Ursus (Bears)
Species	Retusa obtusa	Ursus maritimus

Evolutionary Relationship

Arctic barrel-bubble and Polar bear share a common ancestor at the Kingdom level: Animalia. (hewan)

Conservation Status

Arctic barrel-bubble

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Arctic barrel-bubble	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Arctic barrel-bubble

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Arctic barrel-bubble

The Arctic barrel-bubble (Retusa obtusa) is a species in the genus Retusa. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway